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DR Rad 177
| Question | Answer |
|---|---|
| ______ Was the last to go digital | Radiography |
| PSP plate can go inside _____ | Film Cassette |
| PSP stands for ______ | Photo Stimulable Phosphor |
| FPD stands for _______ | Flat panel detector |
| In _________, Detector directly captures the image No reader needed to release latent image | Direct Radiography (DR) |
| In _______, Phosphors temporarily store energy as latent image Reader converts latent image to electric signal | Computed Radiography (CR) |
| Computed Radiography (CR) uses a _______ | PSP Receptor |
| Direct Radiography (DR) uses a _______ | FPD Receptor |
| X-rays -> light -> analog electric signal | Indirect Capture |
| X-rays -> analog electric signal | Direct Capture |
| Converting X-rays to light requires the use of a ________ | Scintillator |
| A Cesium iodide (CsI) Phosphor Scintillator is ________ and used exclusively in CCD | Structured |
| A Gadolinium Oxysulfide (Gd2O2S) Phosphor Scintillator is ____ and can be used in TFT | Unstructured/Turbid |
| _________ has better special Resolution? | Cesium iodide (CsI) |
| All _______ Capture require a scintillator | Indirect |
| Either a CCD/CMOS or TFT comes _____ a scintillator | After |
| TFT stands for ______ | Thin Film Transistor |
| CCD stands for ______ | Charged Coupling Device |
| CMOS stands for ______ | Complementary Metal-Oxide-Semiconductor |
| An x-ray receptor has an array of ________ | Closely Spaced CCDs |
| Signal passes for readout one row at a time- | CCD |
| Each pixel has its own readout mechanism (amplifier and storage capacitor)- | CMOS |
| CCD is _______ age technology | Oldest |
| CMOS is ________ age technology | Newest |
| Receptor Size- CCD can | Use Any Size |
| Receptor Size- CMOS can | Only Use Small Sizes |
| _____ Is cheaper, requires less power, and acquires images the fastest | CMOS |
| _____ Has Less Noise Susceptibility and More Light Sensitivity | CCD |
| The ______ stores signal, acts as a switch to the ADC (Switch to release electric signal) | TFT |
| All Indirect Capture systems will have a _______ due to having 3 steps | Loss of Resolution |
| _______ Capture is more efficient | Direct |
| The Photodetector/photodiode converts light to analog electric signal in ________ | TFT Indirect Capture |
| The CCD converts light to analog electric signal in ________ | CCD/CMOS Indirect Capture |
| _________ Converts electric signal to digital signal for computer | Analog Digital Converter (ADC) |
| In CCD/CMOS Indirect Capture, light passes through a _______ before entering the CCD | Fiber Optic Bundle |
| In TFT Indirect Capture, light passes through a _______ | Active Matrix Array (AMA) |
| ______ is used to convert light into an electric signal in TFT Indirect Capture | Amorphous Silicon (a-Si) |
| 20% = | Conductors, Capacitors, TFT, etc |
| 80% = | Photodetector |
| Only _____ of the x-rays contribute to the image | 80% |
| In TFT Direct Capture, _______ | X-rays are absorbed by a photoconductor and converted into an electric signal |
| ______ photoconductor is used In TFT Direct Capture | (Amorphous Selenium: a-Se) |
Created by:
user-2016295